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TECHNICAL PAPERS: Heat Transfer Enhancement

Forced Convection Heat Transfer Enhancement Using a Self-Oscillating Impinging Planar Jet

[+] Author and Article Information
Cengiz Camci, Frank Herr

Turbomachinery Heat Transfer Laboratory, The Pennsylvania State University, Department of Aerospace Engineering, 223 Hammond Building, University Park, PA 16802

J. Heat Transfer 124(4), 770-782 (Jul 16, 2002) (13 pages) doi:10.1115/1.1471521 History: Received June 30, 2000; Revised February 15, 2002; Online July 16, 2002
Copyright © 2002 by ASME
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References

Martin,  H., 1977, ‘‘Heat and Mass Transfer Between Impinging Gas Jets and Solid Surfaces,” Advances in Heat Transfer, , ., eds., 13, Academic Press, New York, pp. 1–60.
Goldstein,  R. J., Behbahani,  A. I., and Heppelmann,  K. K., 1986, “Streamwise Distribution of the Recovery Factor and the Local Heat Transfer Coefficient to an Impinging Circular Air Jet,” Int. J. Heat Mass Transf., 29(8), pp. 1227–1235.
Gardon, R., and Cobonpue, J., 1962, “Impingement Cooling From a Circular Jet in a Cross Flow,” Proceedings of 2nd International Heat Transfer Conference, pp. 719–730.
Gardon,  R., and Akfirat,  J. C., 1965, “The Role of Turbulence in Determining the Heat Transfer Characteristics of Impinging Jets,” Int. J. Heat Mass Transf., 8, pp. 1261–1272.
Goldstein,  R. J., and Franchett,  M. E., 1988, “Heat Transfer From a Flat Surface to an Oblique Impinging Jet,” ASME J. Heat Transfer, 110, pp. 84–90.
Foss,  J. F., 1979, “Measurements in a Large-Angle Oblique Jet Impingement Flow,” AIAA J., 17(8), pp. 801–802.
Goldstein,  R. J., Sobolik,  K. A., and Seol,  W. S., 1990, “Effect of Entrainment on the Heat Transfer to a Heated Circular Aid Jet Impinging on a Flat Surface,” ASME J. Heat Transfer, 112, pp. 608–611.
Goldstein,  R. J., and Seol,  W. S., 1991, “Heat Transfer to a Row of Impinging circular Air Jets Including the Effects of Entrainment,” Int. J. Heat Mass Transf., 34(8), pp. 2133–2147.
Viets,  H., 1975, “Flip-Flop Jet Nozzle,” AIAA J., 13(8), pp. 1375–1379.
Raman,  G., Hailye,  M., and Rice,  E., 1993, “Flip-Flop Jet Nozzle Extended to Supersonic Flows,” AIAA J., 31(6), pp. 1028–1035.
Herr, F., and Camci, C., 1994, “Validation of an Analytical Model for an Unsteady Planar Jet with Self-Sustained Oscillations,” AIAA paper 94-2205.
Herr, F., 1995, “Turbulent Transport in a Planar Jet with Self-Sustained Deterministic Oscillations and the Character of Impinging Region Heat Transfer,” Ph.D. thesis, Dept. of Aerospace Engineering, Pennsylvania State University, University Park, PA.
Herr, F., and Camci, C. 1994, “Turbulent Mixing and Transport in a Planar Jet with Self-Sustained Deterministic Oscillations,” 1994 ASME Winter Annual Meeting, ASME AD-Vol. 40, ASME, New York.
Page,  R. H., Chinnock,  P. S., and Seyed-Yagoobi,  J., 1996, “Self-Oscillation Enhancement of Impingement Jet Heat Transfer,” AIAA Journal of Thermophysics,10(2), pp. 380–382.
Azevedo,  L. F. A., Webb,  B. W., and Queiroz,  M., 1994, “Pulsed Air Jet Impingement Heat Transfer,” Exp. Therm. Fluid Sci., 8, pp. 206–213.
Liu,  T., and Sullivan,  J. P., 1996, “Heat Transfer and Flow Structures in an Excited Circular Impinging Jet,” Int. J. Heat Mass Transf., 39(17), pp. 3695–3706.
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Wiedner,  B. G., and Camci,  C., 1996, “Deterministic of Convective Heat Flux on Steady-State Heat Transfer Surfaces With Arbitrarily Specified Boundaries,” ASME J. Heat Transfer, 118, pp. 101–107.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, pp. 3–8.
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Figures

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A planar jet with self-sustained oscillations
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Geometrical details of the nozzle and the experimental setup for the self-oscillating impinging jet experiments
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Heat transfer surface construction
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Effect of nozzle throat width and communicating tube length on oscillation frequency of the jet, (ϕ=20 deg)
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Axial, lateral mean velocity profiles and Reynolds stresses in oscillating jet
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Stationary jet Nusselt number distributions on impingement plate, influence of Reynolds number and impingement plate location x/d, baseline data set
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Impingement plate heat transfer distribution from stationary jet, Nu/Re−0.56 distribution for all Reynolds numbers in function of y/d
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Self-oscillating-jet Nusselt number distributions on impingement plate, influence of Reynolds number and impingement plate location x/d
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Impingement plate heat transfer distribution from oscillating jet, Nu/Re−0.50 distribution for all Reynolds numbers in function of y/d
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Comparison of oscillating jet and stationary jet heat transfer distributions on the impingement plate, Re=7500
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Comparison of oscillating jet and stationary jet heat transfer distributions on the impingement plate, Re=10,000
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Comparison of oscillating jet and stationary jet heat transfer distributions on the impingement plate, Re=14,000
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Stagnation line heat transfer at various nozzle to impingement plate distances, without and with jet oscillations

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